Equal energy sharing double photo ionization of the Helium atom at 20eV and 40eV above threshold
J. N. Das, K. Chakrabarti, S. Paul
Abstract
In this article we present triple differential cross sections for equal energy sharing kinematics for double photoionization of the helium atom at 20 and 40eV above threshold in the framework of the hyperspherical partial wave theory. This supplements our earlier work DCP03 in which we were successful in showing fully, gauge independence of the results in our formalism. Also in this work we treat cases in which the Stokes parameter S1 < 1 so that partial polarization of the photon source is also taken into account. Agreement in shape with the Convergent Close Coupling BK03,HB98 calculation and the experiments appears to be excellent.
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